Institutional Repository of Yantai Institute of Coastal Zone Research, CAS
Not a member yet
13079 research outputs found
Sort by
Modeling Blue Crab (<i>Callinectes sapidus</i>) Larval Transport and Recruitment Dynamics in a Shallow Lagoon-Inlet-Coastal Ocean System
No full textBlue crab (Callinectes sapidus) supports lucrative Mid-Atlantic crustacean fisheries and plays an important role in estuarine ecology, so their larval transport and recruitment dynamics in the Maryland Coastal Bays system were investigated using simulated and observed surface drifters. Relative contributions of winds, tides, density gradients, and waves to larval recruitment success were identified during the spawning season, particularly under hurricane conditions in 2014. Based on temperature (e.g., 19-29 degrees C) and salinity conditions (e.g., 23-33 PSU), particles representing virtual blue crab larvae were released into the model domain from early June to late October 2014. During the spawning season, variations in the larval recruitment success caused by wind speed and direction, tides (e.g., affecting through inlets), density gradients (e.g., salinity variations), and surface gravity waves were 17%, 4%, -9%, and 17%, respectively. During Hurricane Arthur (2014), variability of self-recruitment success caused by density gradients are negligible while by other three factors are comparable at 3%-4%. Surface drifter experiments support the modeling results that larval recruitment success is strongly associated with the coastal circulation. The high (low) self-recruitment success in the Assawoman and Chincoteague Bays (Sinepuxent Bay) is related to the locally weak (strong) circulation; released larvae escape from inlets are likely recruited to southern Fenwick and northern Assateague Islands, and the coastal regions outside the Chincoteague Inlet. Understanding physical factors influencing larval recruitment success helps resource managers make informed decisions about habitat restoration and harvest regulations, in addition to seafood-related food security
Insight into mercury ion detection in environmental samples and imaging in living systems by a near-infrared fluorescent probe
No full textSince mercury could accumulate along with the food chains and undermine environment and human health, development of efficient mercury detection tools in water samples, plants and living systems is of great significance. In this work, we designed a hemicyanine-based fluorescent probe HCYS for mercury detection. The probe exhibited distinct near-infrared fluorescence intensity. Based on the spin orbit coupling effect and heavy atom effect of Hg2+, a significant fluorescent change was exhibited since Hg2+ chelated with the probe by inhibition of the intramolecular charge transfer process in HCYS. The limit of detection (LOD) was calculated to be 1.41 mu M. Exploiting the benefits of fast response time (less than 1 min), high selectivity and noninvasively track capacity, the probe has been applied in biological systems. The solid results proved that the probe HCYS is a powerful tool for Hg2+ imaging in living cells, zebrafish, pea spouts and water samples
Coastline protection and restoration: A comprehensive review of China's developmental trajectory
No full textIn the intricate interplay between terrestrial and marine realms, coastlines have emerged as crucial geographical entities, playing significant roles in theories of human-environment relations and the implementation of coordinated developmental technologies. Subjected to various forces, such as storm surges, hurricanes, and human activities like land development, sand mining, and fishpond farming, coastlines have undergone substantial morphological changes, resulting in a decline in natural preservation rates. This has drawn global attention to the need for coastline protection and restoration. China's rapid economic development along its coast in recent decades has induced significant alterations in coastline morphology and usage, causing detrimental effects on natural coastlines. In response, the Chinese government has instituted measures involving policy formulation, regulations for coastline preservation, and extensive research efforts to improve restoration methods. This article expounds on China's policies on coastline restoration through a comprehensive review of literature and empirical field investigations. It also presents an overview of prevalent restoration methodologies for four typical coastal configurations and explores research pertaining to coastal ecological restoration. Moving beyond retrospective analysis, this article provides profound insights into the prospective landscape of China's policies and technologies concerning coastline protection and restoration. Indeed, these suggestions can serve as valuable references and scientific foundations for the preservation and restoration of coastlines
Integration of clinical and spatial data to explore lipid metabolism-related genes for predicting prognosis and immune microenvironment in gliomas (Retraction of Vol 23, art no 82, 2023)
No full textAdvances in peptide-based drug delivery systems
No full textDrug delivery systems (DDSs) are designed to deliver drugs to their specific targets to minimize their toxic effects and improve their susceptibility to clearance during targeted transport. Peptides have high affinity, low immunogenicity, simple amino acid composition, and adjustable molecular size; therefore, most peptides can be coupled to drugs via linkers to form peptide-drug conjugates (PDCs) and act as active pro-drugs. PDCs are widely thought to be promising DDSs, given their ability to improve drug bio-compatibility and physiological stability. Peptide-based DDSs are often used to deliver therapeutic substances such as anti-cancer drugs and nucleic acid-based drugs, which not only slow the degradation rate of drugs in vivo but also ensure the drug concentration at the targeted site and prolong the half-life of drugs in vivo. This article provides an profile of the advancements and future development in functional peptide-based DDSs both domestically and internationally in recent years, in the expectation of achieving targeted drug delivery incorporating functional peptides and taking full advantage of synergistic effects
Distribution, sources, and eco-risk of Current-Use Pesticides (CUPs) in the coastal waters of the northern Shandong Peninsula, China
No full textThis study investigated the spatial distributions and seasonal variations of 19 CUPs in the coastal areas of the Shandong Peninsula and its surrounding rivers and assessed their ecological risk. In freshwater and seawater, insecticides (chlorpyrifos, methoxychlor, and pyridaben), as well as fungicides (fenarimol) and herbicides (dichlobenil) were the main pollutants (Detection Frequency: 100 %). Spatially, during winter, the regional pollution levels of Sigma(19)CUPs in seawater showed a trend of Laizhou Bay (LZB, mean:4.13 ng L-1) > Yellow River Estuary (YRE, mean:2.57 ngL(-1)) > Bohai Bay (BHB, mean:2.21 ng L-1) > Yanwei Area (YWA, mean:1.94 ng L-1). The similarities of major substances between rivers and the marine environment suggest that river discharge is the main source of CUPs pollution in coastal areas. In summer, CUPs in rivers posed a high risk. In winter, the risk significantly decreased, indicating a moderate overall risk. Seawater exhibited a low risk in winter
Particle Size Distribution Slope Changes along the Yellow River Delta Observed from Sentinel 3A/B OLCI Images
No full textQuantitative estimates of particle size in estuaries and shelf areas are important to understand ocean ecology and biogeochemistry. Particle size can be characterized qualitatively from satellite observations of ocean color. As a typical marginal sea, the Yellow River Delta (YRD) with the Bohai Sea experiences a complex hydrodynamic environment. Here, we attempt to quantify the particle size distribution (PSD) slope (xi) based on its relationship with the particle backscattering exponent from Sentinel-3A/B OLCI. The PSD slope, xi displays temporal and spatial variability in the YRD with the Bohai Sea. Its value varies between 3 and 4, and typically exceeds 5 in offshore areas. The lowest value of xi occurs in the winter, indicating the presence of fine inorganic particles in the water, while high values are attained in the spring, when phytoplankton blooms increase the particle size. xi decreases near the river mouth because of the large sediment-laden discharge debouching into the sea. We detected a slight increase in xi when turbid waters were present in the period 2016-2022. Environmental factors, such as sea surface temperature, sea surface wave height, and wind, may control particle size and xi in the long term. Inorganic suspended particle matter is derived along the YRD using the magnitude of xi. The mean inorganic suspended particle matter area in winter approaches 23,900 km(2) when xi < 4.6. This study thoroughly characterizes variations in xi in the YRD with the Bohai Sea and clarifies the contributions of driving factors from human activities and climate change
Sea Cucumber Viscera Contains Novel Non-Holostane-Type Glycoside Toxins that Possess a Putative Chemical Defense Function
No full textSea cucumbers frequently expel their guts in response to predators and an aversive environment, a behavior perceived as releasing repellents involved in chemical defense mechanisms. To investigate the chemical nature of the repellent, the viscera of stressed sea cucumbers (Apostichopus japonicus) in the Yellow Sea of China were collected and chemically analyzed. Two novel non-holostane triterpene glycosides were isolated, and the chemical structures were elucidated as 3 beta-O-[beta-D-glucopyranosyl-(1 -> 2)-beta-D-xylopyranosyl]-(20S)-hydroxylanosta-7,25-diene-18(16)-lactone (1) and 3 beta-O-[beta-D-quinovopyranosyl-(1 -> 2)-beta-D-xylopyranosyl]-(20S)-hydroxylanosta-7,25-diene-18(16)-lactone (2) by spectroscopic and mass-spectrometric analyses, exemplifying a triterpene glycoside constituent of an oligosaccharide containing two sugar-units and a non-holostane aglycone. Zebrafish embryos were exposed to various doses of 1 and 2 from 4 to 96 hpf. Compound 1 exposure showed 96 h-LC50 41.5 mu M and an increased zebrafish mortality rates in roughly in a dose- and time-dependent manner. Compound 2, with different sugar substitution, exhibited no mortality and moderate teratogenic toxicity with a 96 h-EC50 of 173.5 mu M. Zebrafish embryos exhibited teratogenic effects, such as reduced hatchability and total body length. The study found that triterpene saponin from A. japonicus viscera had acute toxicity in zebrafish embryos, indicating a potential chemical defense role in the marine ecosystem
Recent advances and challenges in monitoring chromium ions using fluorescent probes
No full textChromium is among the most strategic and critical transition metal elements and has extensive applications in both industrial and biological contexts. The most stable oxidation states of chromium are trivalent chromium (Cr (III)) and hexavalent chromium (Cr(VI)). Cr(III) is recognized as an effective trace nutrient, whereas Cr(VI) in its highest oxidation state poses a toxic threat to human health due to its potent oxidizing capacities. To mitigate the risk of poisoning, efficient detection methods have been developed to meet testing requirements. Comparing with traditional methods, colorimetric and fluorescent techniques have emerged as simple, time-efficient, highly selective and sensitive, cost-effective and particularly well-suited for biological applications. Furthermore, these methods excel in distinguishing between trivalent and hexavalent chromium, even in low-level concentrations and complex matrices. Since the scarcity of fluorescent probes for chromium, most existing reviews merely touch upon this topic without providing comprehensive coverage. Therefore, this review aims to consolidate information on small molecular fluorescent probes and fluorescent materials serve as fluorescent probes for monitoring Cr2+, Cr3+, Cr2O72- and CrO42- in environmental settings and living cells. We anticipate that this review will promote the development of novel fluorescent probes for chromium detection, facilitating their applications in chemical, biological and medical domains
A method for breeding fast-growing strains of unicinctus unicinctus based on intestinal flora
No full text本发明提供一种基于肠道菌群的单环刺螠速生品系选育方法，属水产新品种创制领域。通过对比同批次生长速率差异个体中肠道菌群的异同，筛选出与速生相关的特殊菌群。以此作为指标选育速生群体。本发明的选育方法与常规迭代选育相比，选育速度大幅加快，可实现无创筛选，为单环刺螠新品系的选育和新品种开发提供了新途径